(c) What is the value of the degree of polymerization n of isotactic PB with a molecular weight of 3.091×105 g/mol?
(C4H8)n = 3.091E5
Substitute for C4H8 and solve for n.
Degree of Polymerization is calculated as the ratio of the given weight of the polymer to the weight of the single monomer in the polymer chain.
5520
To find the value of the degree of polymerization (n) of isotactic PB (Polybutene), we need to use the relationship between molecular weight and the degree of polymerization.
The formula to calculate the degree of polymerization is:
n = Mw / Mm
Where:
n = degree of polymerization
Mw = molecular weight of the polymer (g/mol)
Mm = average molecular weight of the repeating unit (g/mol)
In the case of Polybutene (PB), we need to determine the average molecular weight of the repeating unit.
The molecular weight (Mw) of PB is given as 3.091×105 g/mol. However, we need to convert it to the average molecular weight of the repeating unit (Mm) to use in the formula.
To do this, we need to know the molecular structure of Polybutene (PB) and then calculate the molecular weight of the repeating unit. Once we have the molecular weight of the repeating unit, we can substitute it into the formula to find the degree of polymerization (n).
Unfortunately, without further information about the molecular structure of specific isotactic PB, it is not possible to calculate the degree of polymerization accurately. Different isotactic PB molecules may have different molecular weights and structures.
If you have additional details about the molecular structure or some other information, let me know, and I can help you in a more precise manner.